Kernel oops - unable to handle kernel NULL pointer dereference; IP: intel_ddi_post_disable+0x54/0x170 [i915]

[Henning Hoefer]

I use Ubuntu 18.04.1 LTS on a Lenovo Thinkpad T460p.

Today I upgraded to Kernel 4.15.0-44 – since then my system crashes when logging in (when the display resolution should switch). The previous Kernel 4.15.0-43 works fine, though.

Here's the crash:

Jan 29 11:08:05 hho-pc kernel: [ 20.127785] BUG: unable to handle kernel NULL pointer dereference at 0000000000000245
Jan 29 11:08:05 hho-pc kernel: [ 20.127868] IP: intel_ddi_post_disable+0x54/0x170 [i915]
Jan 29 11:08:05 hho-pc kernel: [ 20.127873] PGD 0 P4D 0
Jan 29 11:08:05 hho-pc kernel: [ 20.127882] Oops: 0000 [#1] SMP PTI
Jan 29 11:08:05 hho-pc kernel: [ 20.127887] Modules linked in: ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack nf_nat nf_conntrack libcrc32c br_netfilter bridge stp llc ccm aufs pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) overlay vboxdrv(OE) bnep binfmt_misc nls_iso8859_1 uvcvideo btusb btrtl videobuf2_vmalloc btbcm videobuf2_memops intel_rapl btintel videobuf2_v4l2 snd_hda_codec_hdmi cdc_ether videobuf2_core usbnet bluetooth mii option usb_wwan videodev x86_pkg_temp_thermal usbserial intel_powerclamp media coretemp ecdh_generic arc4 kvm_intel snd_hda_codec_realtek snd_hda_codec_generic kvm snd_hda_intel irqbypass snd_hda_codec crct10dif_pclmul crc32_pclmul snd_hda_core thinkpad_acpi ghash_clmulni_intel
Jan 29 11:08:05 hho-pc kernel: [ 20.127985] snd_hwdep pcbc snd_pcm nvram snd_seq_midi aesni_intel snd_seq_midi_event snd_rawmidi aes_x86_64 crypto_simd glue_helper cryptd snd_seq input_leds iwlmvm mac80211 joydev iwlwifi rtsx_pci_ms intel_cstate snd_seq_device memstick intel_rapl_perf snd_timer serio_raw cfg80211 wmi_bmof snd mei_me soundcore mac_hid intel_pch_thermal mei shpchp sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid hid rtsx_pci_sdmmc nouveau i915 mxm_wmi ttm i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse ptp pps_core drm ahci i2c_i801 rtsx_pci libahci wmi video
Jan 29 11:08:05 hho-pc kernel: [ 20.128082] CPU: 6 PID: 3769 Comm: Xorg Tainted: G OE 4.15.0-44-generic #47-Ubuntu
Jan 29 11:08:05 hho-pc kernel: [ 20.128086] Hardware name: LENOVO 20FW003NGE/20FW003NGE, BIOS R07ET87W (2.27 ) 09/27/2018
Jan 29 11:08:05 hho-pc kernel: [ 20.128150] RIP: 0010:intel_ddi_post_disable+0x54/0x170 [i915]
Jan 29 11:08:05 hho-pc kernel: [ 20.128155] RSP: 0018:ffffc01a89477a60 EFLAGS: 00010297
Jan 29 11:08:05 hho-pc kernel: [ 20.128161] RAX: 0000000000000007 RBX: ffff9cd490be9000 RCX: ffffffffc034d272
Jan 29 11:08:05 hho-pc kernel: [ 20.128165] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9cd490be9000
Jan 29 11:08:05 hho-pc kernel: [ 20.128170] RBP: ffffc01a89477a90 R08: 0000000000000007 R09: 0000000000000000
Jan 29 11:08:05 hho-pc kernel: [ 20.128174] R10: 0000000000000159 R11: 00000000000000c1 R12: 0000000000000000
Jan 29 11:08:05 hho-pc kernel: [ 20.128178] R13: ffff9cd490be9000 R14: ffff9cd48f7c8000 R15: ffff9cd4bcdc3000
Jan 29 11:08:05 hho-pc kernel: [ 20.128184] FS: 00007fdbc113e600(0000) GS:ffff9cd4c1580000(0000) knlGS:0000000000000000
Jan 29 11:08:05 hho-pc kernel: [ 20.128189] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 29 11:08:05 hho-pc kernel: [ 20.128193] CR2: 0000000000000245 CR3: 00000007cd49c002 CR4: 00000000003606e0
Jan 29 11:08:05 hho-pc kernel: [ 20.128198] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jan 29 11:08:05 hho-pc kernel: [ 20.128202] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Jan 29 11:08:05 hho-pc kernel: [ 20.128205] Call Trace:
Jan 29 11:08:05 hho-pc kernel: [ 20.128267] ? intel_dp_sink_dpms+0xbb/0xf0 [i915]
Jan 29 11:08:05 hho-pc kernel: [ 20.128324] intel_mst_post_disable_dp+0x99/0xd0 [i915]
Jan 29 11:08:05 hho-pc kernel: [ 20.128384] intel_encoders_post_disable.isra.102+0x66/0x80 [i915]
Jan 29 11:08:05 hho-pc kernel: [ 20.128438] haswell_crtc_disable+0xe8/0x150 [i915]
Jan 29 11:08:05 hho-pc kernel: [ 20.128493] intel_atomic_commit_tail+0x7ea/0xd30 [i915]
Jan 29 11:08:05 hho-pc kernel: [ 20.128545] intel_atomic_commit+0x277/0x2b0 [i915]
Jan 29 11:08:05 hho-pc kernel: [ 20.128579] drm_atomic_commit+0x51/0x60 [drm]
Jan 29 11:08:05 hho-pc kernel: [ 20.128608] drm_atomic_connector_commit_dpms+0xef/0x100 [drm]
Jan 29 11:08:05 hho-pc kernel: [ 20.128635] drm_mode_obj_set_property_ioctl+0x176/0x280 [drm]
Jan 29 11:08:05 hho-pc kernel: [ 20.128663] ? drm_mode_connector_set_obj_prop+0x80/0x80 [drm]
Jan 29 11:08:05 hho-pc kernel: [ 20.128686] drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm]
Jan 29 11:08:05 hho-pc kernel: [ 20.128710] drm_ioctl_kernel+0x5f/0xb0 [drm]
Jan 29 11:08:05 hho-pc kernel: [ 20.128733] drm_ioctl+0x31b/0x3d0 [drm]
Jan 29 11:08:05 hho-pc kernel: [ 20.128756] ? drm_mode_connector_set_obj_prop+0x80/0x80 [drm]
Jan 29 11:08:05 hho-pc kernel: [ 20.128764] ? vfs_writev+0xb9/0x110
Jan 29 11:08:05 hho-pc kernel: [ 20.128773] do_vfs_ioctl+0xa8/0x630
Jan 29 11:08:05 hho-pc kernel: [ 20.128782] ? __sys_recvmsg+0x80/0x90
Jan 29 11:08:05 hho-pc kernel: [ 20.128789] SyS_ioctl+0x79/0x90
Jan 29 11:08:05 hho-pc kernel: [ 20.128798] do_syscall_64+0x73/0x130
Jan 29 11:08:05 hho-pc kernel: [ 20.128807] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Jan 29 11:08:05 hho-pc kernel: [ 20.128812] RIP: 0033:0x7fdbbe5385d7
Jan 29 11:08:05 hho-pc kernel: [ 20.128816] RSP: 002b:00007ffcc64f40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Jan 29 11:08:05 hho-pc kernel: [ 20.128822] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdbbe5385d7
Jan 29 11:08:05 hho-pc kernel: [ 20.128827] RDX: 00007ffcc64f4100 RSI: 00000000c01064ab RDI: 000000000000000d
Jan 29 11:08:05 hho-pc kernel: [ 20.128831] RBP: 00007ffcc64f4100 R08: 000055c248e6c5a0 R09: 000000000000000a
Jan 29 11:08:05 hho-pc kernel: [ 20.128835] R10: 000055c24994eb40 R11: 0000000000000246 R12: 00000000c01064ab
Jan 29 11:08:05 hho-pc kernel: [ 20.128839] R13: 000000000000000d R14: 000055c2495546f0 R15: 000055c248e5acb0
Jan 29 11:08:05 hho-pc kernel: [ 20.128844] Code: 0d f6 86 44 02 00 00 40 0f 85 81 00 00 00 83 f8 06 72 77 83 f8 08 76 13 83 f8 0a 75 6d 41 f6 86 60 06 00 00 40 0f 84 dd 00 00 00 <41> f6 84 24 45 02 00 00 08 4d 8d bd 00 01 00 00 74 3e 48 89 df
Jan 29 11:08:05 hho-pc kernel: [ 20.128986] RIP: intel_ddi_post_disable+0x54/0x170 [i915] RSP: ffffc01a89477a60
Jan 29 11:08:05 hho-pc kernel: [ 20.128989] CR2: 0000000000000245
Jan 29 11:08:05 hho-pc kernel: [ 20.128995] ---[ end trace 8a95ed7827217c97 ]---

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Kai-Heng Feng (kaihengfeng)]

See
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813663/comments/3

[Henning Hoefer (hoeferh)]

@kaihengfeng:

Thank you! I tested it and can confirm that the Kernel you linked to (Ubuntu 4.15.0-45.48~lp1813663-generic 4.15.18) works again.

[Jonas Pedersen (jonasped)]

I can also confirm that the fix in #4 works. Tested on Lenovo T480 with USB-C dock.

[Kleber Sacilotto de Souza (kleber-souza)]

Per previous comments, I'm going to duplicate this report against bug 1813663. Thank you!

[Ionut Iosef (iiosef)]

I also encountered this issue on Ubuntu 16.04.6 LTS, kernel 4.15.0-48-generic, on ThinkSystem SR650.

Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.471731] BUG: unable to handle kernel NULL pointer dereference at 000000000000000c
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.480702] IP: __atime_needs_update+0x14/0x190
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.485975] PGD 8000002f64967067 P4D 8000002f64967067 PUD 2f8e4f3067 PMD 0
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.493982] Oops: 0000 [#1] SMP PTI
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.498082] Modules linked in: cfg80211 tcp_diag inet_diag cls_fw sch_sfq sch_prio ip6table_
filter ip6_tables iptable_filter xt_length xt_tcpudp xt_mark xt_DSCP xt_dscp iptable_mangle ip_tables x_tables xfs bonding nls_iso8859_1 inte
l_rapl skx_edac x86_pkg_temp_thermal coretemp kvm_intel kvm cdc_ether irqbypass ipmi_ssif usbnet mii ipmi_si intel_cstate intel_rapl_perf ioa
tdma shpchp ipmi_devintf mei_me dca lpc_ich mei acpi_power_meter ipmi_msghandler mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libisc
si_tcp libiscsi scsi_transport_iscsi autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xo
r raid6_pq libcrc32c raid0 multipath linear raid1 ses enclosure bcache mgag200 i2c_algo_bit ttm crct10dif_pclmul drm_kms_helper crc32_pclmul
syscopyarea
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.577343] ghash_clmulni_intel sysfillrect pcbc sysimgblt aesni_intel fb_sys_fops aes_x86_
64 mpt3sas i40e crypto_simd glue_helper nvme raid_class ptp cryptd scsi_transport_sas nvme_core drm pps_core ahci libahci wmi
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.599139] CPU: 35 PID: 1576340 Comm: node_exporter Not tainted 4.15.0-48-generic #51~16.04
.1-Ubuntu
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.609647] Hardware name: Lenovo ThinkSystem SR650 -[7X06CTO1WW]-/-[7X06CTO1WW]-, BIOS -[IV
E116S-1.20]- 02/08/2018
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.621519] RIP: 0010:__atime_needs_update+0x14/0x190
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.627363] RSP: 0018:ffffb1b3cef1fbf8 EFLAGS: 00010202
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.633402] RAX: ffff8cb619b45200 RBX: ffff8ca4bb97d026 RCX: 0000000000000000
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.641578] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffb1b3cef1fde8
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.649755] RBP: ffffb1b3cef1fc28 R08: fefefefefefefeff R09: ffffb1b3cef1fb8c
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.657923] R10: 2f2f2f2f2f2f2f2f R11: ffff8cb619b45238 R12: 8080808080808080
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.666099] R13: 0000000000000000 R14: ffffb1b3cef1fde8 R15: ffffb1b3cef1fd90
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.674276] FS: 00007fa6027fc700(0000) GS:ffff8ca99ff40000(0000) knlGS:0000000000000000
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.683521] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jul 6 07:29:04 ic-defraf1-s4ahu919 kernel: [2837234.690144] CR2: 000000000000000c CR3: 0000002f98d10005 CR4: 0000...